chore: removed sponsorship todo section

Author: jbriones1

public/frosh/2025/index.html

@@ -448,8 +448,6 @@ <h2>Sponsors</h2>
               executives and volunteers. There is one last piece to making Frosh a success:
               <strong>sponsors</strong>.
             </p>
-            <!-- TODO: Insert sponsorship graphic or link to the PDF. -->
-            <p><strong>TODO: Sponsorship graphic.</strong></p>
             <p>
               If you're interested in sponsoring this event, please email
               <strong>[email protected]</strong>.